JPH0668591A - Floppy disk drive - Google Patents

Abstract

PURPOSE:To eliminate the necessity of reinserting a floppy disk by providing plural floppy disk index window detecting mechanisms so as to make the floppy disk, which is inserted backwards, operable. CONSTITUTION:Under the condition in which a floppy disk 12 is inserted in a normal direction, a read and write head A4 is used to read and write the data on the front surface of the disk 12 and a read and write head B5 is used to read and write the data on the back surface. If the disk 12 is inserted in a reversed direction, the head B5 is used to read and write the data on the front surface of the disk 12 and the head A4 is used to read and write the data on the back surface. Moreover, if the disk 12 is inserted in the normal direction, a driving motor 11 rotates in the normal direction using a rotational direction switching signal 16 from a controlling circuit 1. If the disk is inserted in the reversed direction, the motor 11 rotates in the reversed direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive used as an auxiliary storage device of an information processing device.

[0002]

2. Description of the Related Art A conventional floppy disk drive has a fixed floppy disk insertion direction and operates normally only when the floppy disk is inserted in the forward direction.

[0003]

In this conventional floppy disk drive, since the inserting direction of the floppy disk is fixed, normal operation will occur if the disk surface of the floppy disk is inserted in the reverse direction (hereinafter referred to as the reverse direction). There was a problem not to do.

[0004]

SUMMARY OF THE INVENTION A floppy disk drive of the present invention comprises a forward index sensor for detecting an index window of a prop disk inserted in the forward direction and an index window of a floppy disk inserted in the reverse direction. Index sensor for reverse direction, a write protect sensor for forward direction that detects the write protect notch status of the floppy disk inserted in the forward direction, and a write protect notch status for the prop disk inserted in the reverse direction. And a first read / write head for reading and writing on the front surface of the floppy disk inserted in the forward direction or on the back surface of the floppy disk inserted in the reverse direction, and A floppy disk inserted on the back side of the floppy disk or in the opposite direction. A second read / write head for reading / writing the surface of the pid disk, and a drive motor for rotating the floppy disk inserted in the forward direction in the forward direction and rotating the prop disk inserted in the reverse direction in the reverse direction. ing.

[0005]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 3 is a plan view of a floppy disk 12.

The LED A6 and the index detection sensor A8 are the mechanisms for detecting the index window 20 when the floppy disk 12 is inserted into the floppy disk drive in the forward direction, and the write protect sensor is for detecting the write inhibit notch 21. It is A2. On the other hand, the mechanism for detecting the index window 20 when the floppy disk 12 is inserted into the floppy disk drive in the reverse direction is the LED B7 and the index detection sensor B9, and the write protect notch 21 is detected. It is the sensor B3.

The read / write head A4 reads and writes data on one side of the floppy disk 12, and the read / write head B5 reads and writes data on the other side of the floppy disk 12. Clamp mechanism 10 is drive motor 1
The rotation of 1 is transmitted to the floppy disk 12.

Next, the operation of the present invention will be described with reference to FIGS.

The index detection sensor A8 detects that the floppy disk 12 is inserted in the forward direction by detecting the light of the LED A6 which has passed through the index window 20 when the floppy disk 12 is inserted in the forward direction. The control circuit 1 is notified using the index detection signal A15. The write protect sensor A2 detects the state of the write inhibit notch 21 when the floppy disk 12 is inserted in the forward direction, and notifies the control circuit 1 through the write protect signal A14 whether data can be written to the floppy disk 12.

Similarly, when the floppy disk 12 is inserted in the reverse direction, the index detection sensor B9 detects the light of the LED B7 which has passed through the index window 20 and uses the index detection signal B17 to control the circuit 1.
Then, the write protect sensor B3 detects the state of the write inhibit notch 21, and notifies the control circuit 1 through the write protect signal B18 whether data can be written to the floppy disk 12.

The floppy disk 1 notified by the index detection signal A15 and the index detection signal B17.
The control circuit 1 switches the read / write head A4 and the read / write head B5 through the head switching signal 13 according to the inserting direction of 2.

When the floppy disk 12 is inserted in the forward direction, the read / write head A4 is used for reading / writing data on the front surface of the floppy disk 12, and the read / write head B5 is used for reading / writing data on the back surface. If the floppy disk 12 is inserted in the reverse direction, the read / write head B5 is used for reading / writing data on the front surface of the floppy disk 12, and the read / write head A4 is used for reading / writing data on the back surface.

If the floppy disk 12 is inserted in the forward direction, the control circuit 1 uses the disk rotation direction switching signal 16 to rotate the drive motor 11 in the forward direction. If the floppy disk 12 is inserted in the reverse direction, the drive motor 11 is rotated in the reverse direction.

[0015]

As described above, according to the present invention, by providing a plurality of index window detecting mechanisms for floppy disks, the floppy disk can be inserted not only in the forward direction but also in the reverse direction. There is an effect that it is not necessary to consider the disk surface before inserting the floppy disk into the floppy disk drive and to remove the floppy disk after inserting the floppy disk in the reverse direction.

[Brief description of drawings]

FIG. 1 is a side block diagram of an embodiment of the present invention.

FIG. 2 is a plan view of a floppy disk 12 shown in FIG.

[Explanation of symbols]

 1 Control Circuit 2 Write Protect Sensor A 3 Write Protect Sensor B 4 Read / Write Bed A 5 Read / Write Head B 6 LED A 7 LED B 8 Index Detection Sensor A 9 Index Detection Sensor B 10 Clamp Mechanism 11 Drive Motor 12 Floppy Disk 13 Head Switching signal 14 Write protect signal A 15 Index detection signal A 16 Disk rotation direction switching signal 17 Index detection signal B 18 Write protect signal B 20 Index window 21 Write inhibit notch

Claims (1)

[Claims] 1. A forward index sensor for detecting an index window of a prop disk inserted in the forward direction, a backward index sensor for detecting an index window of a floppy disk inserted in the reverse direction, and a forward direction. Forward write protect sensor that detects the write protect notch status of the floppy disk inserted in the disk, and reverse write protect sensor that detects the write protect notch status of the prop disk inserted in the reverse direction. First read / write head for reading and writing on the front surface of the floppy disk inserted in the forward direction or the back surface of the floppy disk inserted in the reverse direction, and the back surface of the floppy disk inserted in the forward direction or the floppy disk inserted in the reverse direction. Second read / write for reading / writing the surface of the disk A floppy disk drive including a head and a drive motor for rotating a floppy disk inserted in the forward direction in the forward direction and rotating a propi disk inserted in the reverse direction in the reverse direction.